mirror of
https://github.com/jemalloc/jemalloc
synced 2026-06-08 15:01:07 +00:00
Mike Hommey
8b49971d0c
MSVC doesn't support C99, and building as C++ to be able to use them is dangerous, as C++ and C99 are incompatible. Introduce a VARIABLE_ARRAY macro that either uses VLA when supported, or alloca() otherwise. Note that using alloca() inside loops doesn't quite work like VLAs, thus the use of VARIABLE_ARRAY there is discouraged. It might be worth investigating ways to check whether VARIABLE_ARRAY is used in such context at runtime in debug builds and bail out if that happens.
98 lines
1.7 KiB
C
98 lines
1.7 KiB
C
#define JEMALLOC_TSD_C_
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#include "jemalloc/internal/jemalloc_internal.h"
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/******************************************************************************/
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/* Data. */
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static unsigned ncleanups;
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static malloc_tsd_cleanup_t cleanups[MALLOC_TSD_CLEANUPS_MAX];
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/******************************************************************************/
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void *
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malloc_tsd_malloc(size_t size)
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{
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/* Avoid choose_arena() in order to dodge bootstrapping issues. */
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return arena_malloc(arenas[0], size, false, false);
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}
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void
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malloc_tsd_dalloc(void *wrapper)
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{
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idalloc(wrapper);
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}
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void
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malloc_tsd_no_cleanup(void *arg)
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{
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not_reached();
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}
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#if defined(JEMALLOC_MALLOC_THREAD_CLEANUP) || defined(_WIN32)
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JEMALLOC_ATTR(visibility("default"))
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void
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_malloc_thread_cleanup(void)
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{
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bool pending[MALLOC_TSD_CLEANUPS_MAX], again;
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unsigned i;
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for (i = 0; i < ncleanups; i++)
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pending[i] = true;
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do {
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again = false;
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for (i = 0; i < ncleanups; i++) {
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if (pending[i]) {
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pending[i] = cleanups[i]();
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if (pending[i])
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again = true;
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}
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}
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} while (again);
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}
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#endif
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void
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malloc_tsd_cleanup_register(bool (*f)(void))
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{
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assert(ncleanups < MALLOC_TSD_CLEANUPS_MAX);
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cleanups[ncleanups] = f;
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ncleanups++;
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}
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void
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malloc_tsd_boot(void)
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{
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ncleanups = 0;
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}
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#ifdef _WIN32
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static BOOL WINAPI
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_tls_callback(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
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{
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switch (fdwReason) {
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#ifdef JEMALLOC_LAZY_LOCK
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case DLL_THREAD_ATTACH:
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isthreaded = true;
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break;
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#endif
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case DLL_THREAD_DETACH:
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_malloc_thread_cleanup();
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break;
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default:
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break;
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}
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return (true);
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}
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JEMALLOC_ATTR(section(".CRT$XLY")) JEMALLOC_ATTR(used)
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static const BOOL (WINAPI *tls_callback)(HINSTANCE hinstDLL,
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DWORD fdwReason, LPVOID lpvReserved) = _tls_callback;
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#endif
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